Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for receiving system information by terminal, the method comprising: receiving first system information from a first base station among the plurality of base stations, wherein the first system information includes a first area identifier for identifying a first predetermined area to which the first base station belongs; receiving, from the first base station, a first area-specific system information block (SIB) which is valid for the first predetermined area and a first cell-specific SIB which is valid for a cell served by the first base station; receiving second system information from a second base station among the plurality of base stations, wherein the second system information includes a second area identifier for identifying a second predetermined area to which the second base station belongs; determining whether the second area identifier is equal to the first area identifier; and receiving, from the second base station, a second area-specific SIB which is valid for the second predetermined area and a second cell-specific SIB which is valid for a cell served by the second base station when the second area identifier is not equal to the first area identifier, or receiving the second cell-specific SIB and no second area-specific SIB from the second base station when the second area identifier is equal to the first area identifier.
This invention relates to wireless communication systems, specifically methods for efficiently receiving system information by a terminal in a network with multiple base stations. The problem addressed is the redundancy and inefficiency in system information transmission when a terminal moves between base stations, particularly when those base stations belong to the same or different predefined areas. The method involves a terminal receiving system information from a first base station, which includes an area identifier for a predefined area to which the base station belongs. The terminal also receives an area-specific system information block (SIB) valid for that area and a cell-specific SIB valid only for the base station's cell. When the terminal connects to a second base station, it receives the second base station's system information, including its area identifier. The terminal compares the second area identifier with the first. If they differ, the terminal receives both the second area-specific SIB and the second cell-specific SIB from the second base station. If the identifiers match, indicating the base stations belong to the same area, the terminal only receives the second cell-specific SIB, avoiding redundant area-specific SIB transmission. This approach optimizes system information delivery by reducing unnecessary transmissions when the terminal moves within the same predefined area.
2. The method of claim 1 , further comprising: requesting the second cell-specific SIB through a random access message to the second base station when the second area identifier is equal to the first area identifier.
3. The method of claim 2 , wherein the random access message is transmitted to the second base station by using an uplink resource included in the first area-specific SIB or the first cell-specific SIB.
4. The method of claim 1 , further comprising: requesting the second area-specific SIB and the second cell-specific SIB through a random access message to the second base station when the second area identifier is not equal to the first area identifier.
5. The method of claim 1 , wherein the second area-specific SIB includes system information according to a support function of at least one of Multimedia Broadcast Multicast Service (MBMS), Device to Device (D2D), Machine Type Communication (MTC), Internet of Things (IoT), or Vehicle to Everything (V2X).
This invention relates to wireless communication systems, specifically to the transmission of system information in cellular networks. The problem addressed is the efficient and flexible distribution of system information to user devices, particularly in scenarios involving advanced communication services such as Multimedia Broadcast Multicast Service (MBMS), Device-to-Device (D2D), Machine Type Communication (MTC), Internet of Things (IoT), or Vehicle-to-Everything (V2X). The invention describes a method for transmitting system information in a wireless communication network, where the system information is organized into area-specific System Information Blocks (SIBs). A first SIB provides general system information applicable across the network, while a second SIB contains additional system information tailored to specific services or functions. The second SIB includes system information relevant to at least one of MBMS, D2D, MTC, IoT, or V2X, allowing devices to access specialized information based on their operational requirements. This approach ensures that devices only receive the necessary system information, optimizing network efficiency and reducing signaling overhead. The method supports dynamic updates to the second SIB, enabling the network to adapt to changing service demands or environmental conditions. The invention enhances flexibility in system information delivery, particularly for emerging communication technologies that require specialized configurations.
6. The method of claim 1 , wherein the second area-specific SIB includes an updated SIB in the second base station.
A system and method for managing system information (SI) in a wireless communication network, particularly in scenarios involving base station handover or cell reselection. The problem addressed is the efficient and timely delivery of updated system information to user equipment (UE) when transitioning between base stations, ensuring seamless connectivity and service continuity. The solution involves a second base station broadcasting an updated system information block (SIB) specific to its coverage area, distinct from the SIB broadcasted by a first base station. This updated SIB includes critical parameters such as cell access restrictions, frequency bands, or other network configurations that may differ between base stations. The UE receives and processes this updated SIB to adapt its communication settings accordingly, avoiding service disruptions. The method ensures that the UE is aware of the latest network conditions and requirements, optimizing resource utilization and maintaining reliable connectivity. The approach is particularly useful in heterogeneous networks where different base stations may have varying configurations or operational constraints. By dynamically updating the SIB, the system minimizes signaling overhead while ensuring UEs have the necessary information to operate efficiently in the new cell.
7. A method for transmitting system information to a terminal by a base station, transmitting system information to the terminal, wherein the system information includes a first area identifier for identifying a first predetermined area to which the base station belongs; receiving a random access message from the terminal; and transmitting, to the terminal, at least one system information block (SIB) requested through a system information request included in the random access message, wherein the system information request is determined by the terminal based on whether the first area identifier is equal to a second area identifier of an adjacent base station, wherein the transmitting, to the terminal, at least one SIB requested through a system information request included in the random access message includes: transmitting a first cell-specific SIB which is valid for a cell served by the base station to the terminal when the system information request is determined based on that the first area identifier is equal to the second area identifier; or transmitting a first area-specific SIB which is valid for the first predetermined area and the first cell-specific SIB to the terminal when the system information request is determined based on that the first area identifier is not equal to the second area identifier.
8. The method of claim 7 , wherein the first area-specific SIB includes system information according to a support function of at least one of Multimedia Broadcast Multicast Service (MBMS), Device to Device (D2D), Machine Type Communication (MTC), Internet of Things (IoT), or Vehicle to Everything (V2X).
This invention relates to wireless communication systems, specifically to the transmission of system information in cellular networks. The problem addressed is the efficient and flexible distribution of area-specific system information to user devices, particularly in scenarios involving advanced communication services like Multimedia Broadcast Multicast Service (MBMS), Device to Device (D2D), Machine Type Communication (MTC), Internet of Things (IoT), or Vehicle to Everything (V2X). These services require tailored system information to support their unique operational requirements, such as broadcast capabilities, direct device communication, or low-power device connectivity. The invention describes a method where a base station transmits system information in a wireless communication system. The system information is organized into area-specific System Information Blocks (SIBs), each tailored to different geographical areas or service needs. A first area-specific SIB includes system information that supports at least one of the following functions: MBMS for efficient multimedia content delivery, D2D for direct device communication, MTC for machine-to-machine communication, IoT for low-power device connectivity, or V2X for vehicle-to-everything communication. The base station broadcasts this SIB to user devices within the relevant area, ensuring they receive the necessary configuration parameters for the supported services. This approach optimizes network efficiency by delivering only the relevant system information to devices in specific areas, reducing overhead and improving service reliability. The method may also involve transmitting additional area-specific SIBs for other services or areas, ensuring comprehensive coverage of system information needs.
9. The method according to claim 7 , wherein the first area-specific SIB includes an updated SIB in the base station.
10. The method of claim 7 , wherein the receiving of the random access message from the terminal comprises receiving the random access message from the terminal through an uplink resource indicated by system information of the adjacent base station.
This invention relates to wireless communication systems, specifically improving random access procedures between a terminal and a base station. The problem addressed is ensuring efficient and reliable random access when a terminal connects to an adjacent base station, particularly in scenarios where the terminal may not have prior synchronization or dedicated resources. The method involves a base station receiving a random access message from a terminal through an uplink resource. This uplink resource is indicated by system information broadcast by an adjacent base station. The system information includes configuration details for the uplink resource, allowing the terminal to transmit the random access message without requiring prior dedicated signaling. This approach reduces latency and signaling overhead, especially in handover or initial access scenarios where the terminal may not yet be synchronized with the target base station. The method may also include the base station transmitting a random access response to the terminal, which includes timing advance information to synchronize uplink transmissions. Additionally, the base station may receive a scheduled transmission from the terminal based on the random access response, completing the random access procedure. This ensures proper synchronization and resource allocation for subsequent data transmission. The invention improves the efficiency of random access procedures by leveraging system information from adjacent base stations, reducing the need for additional signaling and enhancing reliability in wireless communication networks.
11. A terminal for receiving system information, a processor, a memory, and a wireless communication unit, wherein the processor executes a program stored in the memory to perform: receiving first system information from a first base station among the plurality of base stations by using the wireless communication unit, wherein the first system information includes a first area identifier for identifying a first predetermined area to which the first base station belongs; receiving, from the first base station, a first area-specific system information block (SIB) which is valid for the first predetermined area and a first cell-specific SIB which is valid for a cell served by the first base station by using the wireless communication unit; receiving paging message including second system information from a second base station among the plurality of base stations by using the wireless communication unit, wherein the second system information includes a second area identifier for identifying a second predetermined area to which the second base station belongs; determining whether the second area identifier is equal to the first area identifier; and receiving, from the second base station, a second area-specific SIB which is valid for the second predetermined area and a second cell-specific SIB which is valid for a cell served by the second base station by using the wireless communication unit when the second area identifier is not equal to the first area identifier or receiving the second cell-specific SIB and no second area-specific SIB from the second base station by using the wireless communication unit when the second area identifier is equal to the first area identifier.
12. The terminal of claim 11 , wherein the processor executes the program to further perform requesting the second cell-specific SIB through a random access message to the second base station by using the wireless communication unit when the second area identifier is equal to the first area identifier.
13. The method of claim 12 , wherein the random access message is transmitted to the second base station by using an uplink resource included in the first area-specific SIB or the first cell-specific SIB.
14. The terminal of claim 11 , wherein the processor executes the program to further perform: requesting the second area-specific SIB and the second cell-specific SIB through a random access message to the second base station by using the wireless communication unit when the second area identifier is not equal to the first area identifier.
15. The terminal of claim 11 , wherein the second area-specific SIB includes system information according to a support function of at least one of Multimedia Broadcast Multicast Service (MBMS), Device to Device (D2D), Machine Type Communication (MTC), Internet of Things (IoT), or Vehicle to Everything (V2X).
16. The terminal of claim 11 , wherein the second area-specific SIB includes an updated SIB in the second base station.
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February 2, 2021
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